Spark plug



Patente Apr. 18, 1922.

PATENT mm AUGUST J. KLONECK, on NEW YORK, N. Y.

SPARK PLUG:

Specification of Letters Patent.

Patented Apr. 1L8, 1922.

Application filed March 26, 1917. Serial No. 157,447.

T0 aZZ wwm it may concem:

Be it known that I, AUGUST J. KLONECK, a citizen of the German Empire, and .a rosident of New York, in the county of New York and State of New York, have invented certain new and useful Improvemnts in Spark Plugs, of which the following is a specification.

The present invention relates to spark plugs and has for its object to provide an insulator for a spark plug whereby a discharge of current between other points than the spark points will be prevented.

Another object of the invention is to shape the'spark points in a manner so as to prevent oil from remaining at the spark gap.

These and other allied objects are attained by the novel construction, combination and arrangement of parts which hereinafr will be fully specified.

In the drawings, forming a part of this specification and in which similar reference characters denote corresponding parts, Figure 1 is a longitudinal section through my spark plug; Figure 2 is a face view of a member thereof; and Figure 3 is a partial similar section of a somewhat modified spark plug.

With reference to the drawings, a is a screw threaded sleeve shaped part having at its inner end an extended curved or spiral shaped part a, an insulating body b being secured within said sleeve a by a threaded cap (3 and preferable by a bifurcated ring d more clearly shown in Figure 2. Said insulating.body projects at the inner end of said sleeve (L and enclosing within the same another polo et the spark plug, consisting of the spark portion 6 and a shank 6. The latter extends through said insulating body to the outer end at which the same is preierable threaded to receive nuts or other means for fastening current carrying wires. The outer end of said rod 6 is further provided with a slot 6' which may be tapered if desired. The purpose of the slot 6' is to quickly pushing and clamping a wire or switch knife into the same whereby a wire will be held clamped therein without other fastening means. The letter b designates cooling disks secured to electrode rod e, said disks being adapted for cooling the electrode 6 and the insulating body b to a certain extent.

The insulating body has one more grooves b and 6' at either end of the same; the

purpose of which is to elongate the surface of said insulating body between the oppos1te polo parts of the spark plug. At the outer end, the grooves may form the insulat- 1ng body to a conventional bell shape if desired. To permit Securing of such shaped body within said sleeve, -two ways are shown; one by means of .a split ring d, Figure 1, another by means of a bifurcated cap d Figure 2, the two halves of said members d or d being shown in Figure 3. The inner end of said inslating body 6 receives preferable a ont ont portion 6', permitting anse of short spark point without decreasing th'e extending insulating body at other points of said inner end.

A somewhat simple form of spark points is employed in connection with the spark plug. As well known, the spark points get oily by a starting of an engine, permittmg easy carbonizing and short circuiting of said points or 'perhaps an insulation of the same.

T0 free the points of oil the shape of said points (25 and e being curve shaped somewhat like spirals. The spark parts being further provided to extend beyond the spark gap and by employing the inner side of said spirals as the spark gap, it will be clear that inasmuch as oil will not collect at the inside of a spiral, the same will be caused to drop from said sparkprrts at some other point. Although said spark points form preferable a part of a spiral, it will be obvious that a certain position of the spark plug being known, the points may be curve shaped to these condit1ons or suitable deformed.

Having fully described my invention that what I claim as new and desire to secure by Letters Patent is:

1. The combination in a spark plug of the type set forth, of arc shaped spark points forming a gap therebetween, the ends of said.spark points project beyond the gap at right angles with respect to one another, an

insulator carrying one of said spark points carrying the other spark point and said insulacor, said insulator having a bell shaped projection of larger diameter than its body at its enter end.

3. In a spark plug the-combination, of a cylindrical polo part, an insulator secured therein, the latter canying anothe1 pole part, said insulator being formed with circularly projecting collar adapted for producing a greater surfave distance between (ho ends of' the same. and means for securing tho insulator within said cylindrical polo part, said means comprising a nut adapted f'or engaging said cylindrical part, said nut having an inner projecting collar, said insulator havingr fnrther a projection for fastening of the same, and a parted ring provided to be placed between the last mentioned insulator collar and said nut for fastening said insulator in the cylindrical polo part.

4:. The combination, in a spark plug, of curve shaped polo parts, forming a spark gap at the inside of said curve shaped parts, the ends of said parts extending beyond said spark gap, and an insulator, the latter being secured Wibhin one of said polo parts and having the other polo part embedded within, said insulator extending beyond said polo parts and said spark gap, said insulator having annular recesses in the extending ends and a ont ont portion at the extending inner and through which said. spark parts connect with one another.

5. The combination, in a spark plug, of cn1ve shaped polo parts, forming a spark gap at the inside of said curve shaped parts, the ends of said parts extending beyond said spark gap, and an insulator secnred within one or a sleeve forming part and having another polo part embedded therein, said insulator extending beyond said pole parts and 

